Tack-driver.



E. W. KEITH & B. BANNER. TACK DRIVER. APPLICATION FILED NOV. 2, 1008.

926.658. Patented June 29, 1909.

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B. W. KEITH & E. BANNER.

TACK DRIVER.

APPLICATION FILED NOV. 2, 190a.

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ELIAS WILSON KEITH AND EDWARD DANNER, OF TOLEDO, OHIO.

TACK-DRIVER.

Specification of Letters Patent.

Application filed November 2, 1908.

Patented June 29, 1909.

Serial No. 460,593.

To all whom it may concern:

Be it known that we, Emixs NiLsoN KEITH and EDWARD DANNER, citizens of the United States of America, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful linprovoments in Tack-Drivers, of which the following is a specification.

()ur invention relates to improvements in tack drivers which are combined with a hop; per for holding the tacks, and novel means to automatically feed the tacks into the casing of the driving rod.

The objects of our invention are to provide improvements in a tack driver which is combined with a hopper that can be filled with a quantity of tacks and novel means to feed the tacks from the hopper into a casing, whereby the head of the tack is automatically drawn through the medium of magnetic influences in contact with the driving end of the driving rod or plunger, until it is driven into a foreign substance by the operator.

We attain these and other objects by the mechanism illustrated in the accompanying drawing in which:

Figure 1 is a plan view of the preferred form of our device. Fi 2 is a side view of Fig. 1. Fig. 3 is a longitudinal sectional side View of a part of the driving rod, casing, hopper and operating mechanism showing a tack about to be drawn in contact with the driving end of the rod in full lines and its position when in contact with the end of the rod in dotted lines. Fig. 4 is an end view of the hopper and easing as shown in Figs. 1 and 2. Fig. 5 is a plan view of the hopper. Fig. 6 is a side view, partly in section, of the hopper, casing and tapered guiding plate. Fig. 7 is a cross sectional view on the line a: aof Fig. 2. Fig. Sis a plan View of a modification of our device. Fig. 9 is a side view of Fig. 8. Fig. 10 is a cross sectional view taken on the line 0 0 of Fig. 9. Fig. 11 is a plan and cross sectional view of a driving rod having a flattened )ortion. Fig. 12 is an end view of a modii 'ed form of hopper. Fig. 13 is a plan view of Fig. 12. Fig. 14 is a side view of Fig. 12. Fig. 15 is a plan View of the tack guiding plate. Fig. 16 is a side view of Fig. 15. Fig. 17 is an end view of a sliding shoe and pin. Fig. 18 is a plan view of Fig. 17. Fig. 19 is a plan View of an ordinary carpet stretcher that is adapted to be attached to the lower end of the casing.

rcciprocated.

Similar reference characters refer to similar parts throughout the several views.

ircferring to the drawing, 1 designates a driving rod or plunger, 2 the driving knob, and 3 the tubular casing into which the driving rod is inserted and adapted to be A hopper 4- is secured to the tubular casing 3 and is preferably provided with a T slot 5 to receive the heads 5 of the tacks, and leaving the body portion 5 projecting outwardly from the same. A stud bolt (3 is secured on one side of the hopper and extends at right angles with the face of the hopper as shown in Fig. 2. A cam plate 7, having notches 8 and 9, is mounted on the stud bolt and is adapted to be partially rotated. A coil spring 10 is also mounted on the stud bolt and one end is inserted in an aperture formed in the stud bolt adjacent to its free end and. rigidly secured thereto, the other end of the coil spring 10 is securely fastened to one end of a stop pin 11 which projects above and below the cam plate. The coil spring 10 is attached to the stud bolt and stop pin. 11 in such a manner as to constantly retain the cam plate under tension with the stop pin contacting with. the side of the hopper. The stop pin 11 contacts with the side of the hopper and holds the cam plate under tension and prevents it from rotating except in one direction. A slot 12 is formed in the casing and located below the face of the hopper.

Adjacent to the end of the driving rod, an aperture 13 is provided into which an L-shaped pin 13 is securely fastened, leaving one end extending upward and adapted to engage with the notch 9 when the driving rod orplunger is reciprocated in the casing. In front of and adjacent to the cam plate, two coil springs 14 and 1.5 are attached to the hopper in such a way as to leave the ends 16 and 17 of each coil spring depending through the slot 5 into the casing to provide a guide for the body portion of the tack when it is forced into the casing thrrmgh the medium of the feeding mechanism. They also prevent the tack from moving forward in the casing until the driving rod or plunger forces the ends upward into the slot 5 of the hopper and out of the path of the driving rod.

In the modification of our device as shown especially in Figs. 8, 9, 10 and 11,

we use a driving rod or plunger having a flattened portion 18 between the points indicated by the reference letters 0 O. The stop pin 11 is secured to the cam plate as shown in Figs. 1 and 8. A straight pin 20 is fastened to the cam plate leaving one end depending in the path of the pin 21 which is secured in the sliding shoe 22. The sliding shoe 22 is inserted within the casing, leaving the pin 21 projecting through the slot 23 in the casing and when movement is imparted to the plunger or driving red, the pin 21 contacts with the pin 20 par tially rotating the cam plate which in turn forces the tack into the casing in proper position to be driven by the operator.

When the driving rod or plunger is withdrawn from the casing, preparatory to feed-. ing a tack from the hopper and driving it, the shoulder 24 contacts with the end of the sliding shoe, and forces the pin 21 in contact with the pin 20, partially rotating the cam plate which in turn forces the notch 8 in contact with the body portion of the tack and feeds the tack into the casing. This arrangement obviates the necessity of using the L-shaped pin 13 hereinbefore described. A guide plate 25, having its end 26 tapered, is secured within the hope per with the tapered end 26 adjacent to the opening 27 to cause the tack to fall in the position shown in Fig. 3.

The hopper shown in Figs. 12, 13 and 14 is made of and pressed from sheet steel and the lips 28 and 29 are formed from the body portion to take the place of the tapered plate 25.

The end of the driving rod has previously been subjected to magnetic influences, and when each tack is fed into the casing from the hopper by the feeding mechanism, the head of the tack is drawn into contact with the driving end of the plunger or rod.

When the head of the tack is in contact with the end of the plunger, the body portion of the tack extends outwardly therefrom and is held in place until it is driven into some foreign substance.

Referring to Figs. 1, 2, and 3, the operation is as follows: The hopper is filled with a quantity of tacks from which they fall by gravity until each one in its turn contacts with the notch 8 formed in the cam plate 7. The driving rod or plunger is given an upward stroke or partially withdrawn from the casing bringing the L-shaped pin 13 in con tact with the notch 9. This forces the cam plate to partially rotate bringing the edge a of the notch 8 in contact with the first tack in the hopper, forcing it to drop into the easing immediately in the rear of the depending ends 16 and 17 of the coil springs 14 and 15. The magnetized end of the driving rod or plunger draws the head of the tack toward and in contact therewith holding it in close contact and when the downward or forward stroke is given to the driving rod or plunger, the tack is driven into any foreign substance at the will of the operator. This movement is repeated until all of the tacks in the hopper are exhausted when it is again filled by the operator. A carpet stretcher 30 is attached to the outer periphery of the casing and can be used simultaneously with the driving mechanism when desired. Attention is called to the fact that after the hopper is filled with tacks the operation of driving the tacks is accomplished without further handling.

Having fully described our invention, what we claim and desire to secure by Letters Patent is:

1. In a tack driver, the combination of a driving rod having its driving end magnetized, a casing fitted to said driving rod; said casing being provided with a longitudinal slot, a pin fitted adjacent to the end of said driving rod and adapted to engage with said slot, a hopper mounted on said casing, a cam plate rotatably mounted on the hopper; said cam plate being provided with notches, one to engage the tacks in the hopper and force them into the casing for driving purposes and the other to engage with the pin in the driving rod whereby movement is imparted to the cam plate, as described.

2. In a tack driver, the combination of a driving rod having its driving end magnetized, a tubular casing to inclose said driving rod, a hopper secured to said casing, guiding means fitted to the ho per and depending into the casing, a cam p ate mounted on the hopper, means to maintain the cam plate under tension and in proper position for feed ing purposes, means on the driving rod to partially rotate the cam plate, whereby the tacks in the hopper are fed into the casing, and in contact with the end of the driver.

3. In a tack driver, the combination of a driving rod having its driving end magnetized, a .casing to inclose said rod, a hopper for tacks, means to feed the tacks from the hopper into the casing and in contact with the end of the driving rod; said means comprising a cam plate having two notches formed therein and a pin secured to the driving rod, means to permit the cam plate to be rotated under tension, and means to confine the movement of the cam plate to a partial rotation.

In testimony whereof we aflix our signatures in presence of two witnesses.

ELIAS l/VILSON KEITH. EDWARD DANNER.

Witnesses:

HENRY O. OWEN, R. V. PHILLIPS. 

